Sentences with phrase «modern mammals evolved»

So it's possible that these early relatives of modern mammals evolved in cooler, upland areas and that the dinosaurs were in the hotter, lowland areas.

Not exact matches

In a paper published in the journal Systematic Biology and delivered at the Society for Molecular Biology and Evolution Conference this week, Dr Phillips said biases in models of DNA evolution inflated estimates of when modern mammals, which were once no larger than a guinea pig, diversified and evolved into the animals familiar to us today.

There have been suggestions that modern mammals and birds evolved in upland areas, cooler areas, and that's why birds and mammals developed control of their body temperatures.

Ophiacodon probably isn't directly ancestral to modern mammals, and its «warm - blooded» characters show that it may have evolved it in parallel with mammals, which itself is interesting.

Regardless, it represents a key middle step in evolving the exquisitely sensitive modern mammal ear.

The team discovered that the genes responsible for the regulation of NRL became more refined in the placental mammals as the modern retina evolved and were lost in several non-mammalian groups.

Upper molars of modern humans and most extant primates have four cusps that have evolved from the original tribosphenic tooth of therian mammals.

«Megaconus confirms that many modern mammalian biological functions related to skin and integument had already evolved before the rise of modern mammals,» said Luo, who was also part of the team that first discovered evidence of hair in pre-mammalian species in 2006 (Science, 331: 1123 - 1127, DOI: 10.1126 / science.1123026).